91385039 has 2 divisors, whose sum is σ = 91385040. Its totient is φ = 91385038.

The previous prime is 91385027. The next prime is 91385053. The reversal of 91385039 is 93058319.

It is a weak prime.

It is an emirp because it is prime and its reverse (93058319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91385039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91384993 and 91385011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91385059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45692519 + 45692520.

It is an arithmetic number, because the mean of its divisors is an integer number (45692520).

Almost surely, 2^91385039 is an apocalyptic number.

91385039 is a deficient number, since it is larger than the sum of its proper divisors (1).

91385039 is an equidigital number, since it uses as much as digits as its factorization.

91385039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 91385039 is about 9559.5522384681. The cubic root of 91385039 is about 450.4276412145.

The spelling of 91385039 in words is "ninety-one million, three hundred eighty-five thousand, thirty-nine".